Adding-machine



2 SheetsSheet 1. M. O. DOLSON.

ADDING MACHINE.

(ModeL) Patented Dec. 9, 1884.

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(Model.) I 2 Sheets-Sheet 2. M. 0. DOLSON. ADDING MACHINE.

No. 309,035. Patented Dec. 9, 1884.

INVENTOR ATTORNEYS.

WITNESSES N. PETERS. Phaln-Ulhographer, \PJshmghm. n c

Unrrnn STATES PATENT Orrica.

MARTIN ORLANDO DOLSON, OF EL DORADO, KANSAS.

ADDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 309,035, dated December 9, 1 884.

Application filed May 24, 1884. (Modem To aZZ whom it may concern.-

Be it known that I, MARTIN ORLANDO DOL- SON, of El Dorado, Butler county, and State of Kansas, have invented a new and Improved Adding-Machine, of which the following is a full, clear, and exact description.

The object of my invention is to provide a new and improved machine for rapidly and accurately adding columns of numbers.

The invention consists in the construction and combination of parts, as will be hereinafter described and claimed. Additional hands are provided for indicating the hundreds, thousands, and tens of thousands, which are operated from the main spindle, all as will be fully set forth and described hereinafter.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which the same letters of reference indicate the same or corresponding parts in all the figures.

Figure 1 is a face view of my improved adding-machine. Fig. 2 is a rear view of the same. Fig. 3 is a horizontal sectional view of the same on the line x :0, Fig. 4. Fig. 4 is a longitudinal sectional view 011 the line y 9, Fig. 3.

A circular or other box, A, is provided with a dial, B, having a ring, B, divided into twenty parts, which parts are again divided into five parts each. A bar, 0, extends across the face of the dial a short distance from and in front of the same, and the spindle E is journaled in the said bar 0, the dial B, and plates D D, located behind the dial. A bevel cogwheel, a, loosely mounted on the said spindle, engages with a bevel cog-wheel, b, on an upright shaft, F, journaled in a step on the bar 0 and in an arm, E, on the top of the box. The shaft F is provided at its upper end with a crank-handle, F. On the spindle is loosely mounted a hand, G, on which a pawl, H, is pivoted, pressed by a spring, I, secured 011 the hand G, against a ratehet-wheel, 0, having one hundred teeth, and being rigidly mounted on the spindle E. The hand G is secured to the bevel cog-wheel a. A hand, J, is rigidly mounted on the spindle E.

Behind the dial B an arm, K, is rigidly mounted on the spindle E, and this arm engages with a ratchet or toothed wheel, cl, rigidly mounted on a spindle, K, journaled in the dial B and the plates D D, the said spindle being provided on its outer end with a hand, L, rigidly secured thereto, and lGV0l\' ing over a circle marked Hundreds on the dial B. The spindle K is provided with an arm, M. which engages the teeth of a toothed wheel, d", on a spindle, K provided on its outer end with a hand, L, rigidly secured thereto, and revolving over a circle produced 011 the dial B, and marked Thousands. The spindle K is provided with an arm, N, which engages the teeth of a toothed wheel, (1, on a spindle, K, provided on its outer end with a hand, L", revolving over a circle produced on the dial B, and marked Tens of thousands. These circles are subdivided into ten parts each. Springs 0 rest against the above spindles to prevent them from revolving too freely. 011 the inner end of the spindle K a bevel cog-wheel, g, is mounted, which engages a bevel-pinion, h, on a shaft, I, journalcd on the plate D, and having its outer end outside of the casing of the box. A suitable handle, knob, or head, P, is formed on the outer end of the shaft P. The ends of the spindles K and K are squared to receive a clock-key, which can be passed through apertures Q, in the backs R It of the box, to receive the squared end of said spindles to operate said spindles.

The operation is as follows: By means of the shaft F, its handle F, and the intermediate gearing, the hand G is turned to 0 and the hands L L L are brought to 0 on the hundreds, thousands, and tens of thousands cir' clcs by means of the shaft P and the bevelgearing h and a suitable key. The key is used in the same way that all clock-keys are. If, now, the numbers 10, 24., 3S, and 48 are to be added, the hand G is turned by means of shaft F from O to 10 on the dial B, and the pawl H, engaging with the ratchet-wheel c on shaft E, moves the hand J from O to 10. The hand G is moved back to 0, (the hand J remaining at 10,) and then the hand G is brought from O to 24,and also carries the hand J twenty-four subdivisions farther and brings it to 34. Then 38 is added, and then 48. Vhen the hand J passes 100, the spindle E has made one revolution and the arm K has moved the wheel (2 one tooth forward, and consequently the hand L one subdivision on the hundreds-circle, thus showing 100 on the said circle. 'When ten hundreds have been counted, the hand If is moved to 1 on the thousands-circle, and when ten thousands have been counted the hand L is moved to 1 on the tens of thousands circle, and so on. XVhen another series of numbers is to be added, the hands G, J, L, If, and I) must all be brought back to 0. As the hand L must be brought back to 0 very often, I have provided the gearing instead of a key. A stop is provided at the 0 of the main dial B for the hand G.

Having thus described my invention, what I claim, and desire to secure by Letters Iatent, is

1. In an adding-machine, the combination, with the box A, having a dial, B, of the spin dle E, the hand G,loosely mounted on the same, the bevel cog wheel a, connected with the hand G and loosely mounted on the spindle 1D, the bevel cog-wheel b, the shaft F, on which it is mounted, the pawl 11, pivoted on the hand G, the spring I, and the ratchct-wheel c on the spindle E, substantially as herein shown and described.

2. An adding machine consisting, essentially, of the casing A, dial B, spindle E, hand J, rigidly secured to said spindle, beveled cogwheel a, loosely mounted on spindle E, finger G, rigidly secured to said cog-wheel, ratchetwheel 0, rigidly secured to the spindle E below the hand G, pawl II, pivoted to the under side of hand G, spring I for pressing said pawl into contact with said ratchet, an open ating-shaft, I and its pinion 0, hands L L" L, their dials and shafts, ratchetavheels on said shafts, and arms II M N on said spindle E and said shafts, substantially as set forth.

3. The combination, in an adding-machine, with a casing having a dial, a spindle carrying hands, and means for revolving said hands, of the arm K on the hand-carrying spindle, the spindles K K K, bevel-gear g on shaft K, the ends of the shafts K K being squared. to form key-posts, as described, wheels (1 d (2, arms M N, hands L If L on said shafts, pinion 71, meshing with bevel-gear {1, and the shalt 1, extending through the case, for operating the shaft K, substantially as set forth.

MARTIN ORLANDO DOIJSON.

Witnesses:

.Tlurns LI. ll'ieliinnyv, Z. lhvs. 

